Electric-circuit support



Sept. 4, 1923.

- E. R. BIGGS ET AL ELECTRIC CIRCUIT SUPPORT Filed Jan. 22,

EV N

INVENTORS J7. J2

??P ATTORNEY.

Patented Sept. 4, 1923.

EARL R. BIGGS AND CARL B. BIGGS, or CLINTON, INDIANA;-

ELECTRIC-cinema SUPPORT.

Application filed January 22, 1923; Serial in); 614,145

To all whom z't may concern Be it known that we, E AnnlifBiGes and panying drawings and to the letters and figures of reference marked thereon.

This invention relates to means torsupporting'circuit wires used in electric systems,

such as trolley, wires, bonding wiresused in connection with electric railway rails, and electric cables, the invention having reference more particularly to neans wher by electric circuit wires may be supported by metal beams having lateral base flanges,

such: as roof beams in mines where cars are used.

An'object; of the a strong and reliable electric-circuit support trolley of such construction as to be adapted to; be

readily secured filll'lly to an over-head beam, or to a railway rail, to reliably support an electric circuit wire andlstructurally secure the wirethereto. 5

electric-circuitsupport which shall be so constructed as to be capable of being tightly clainpedto various sizes of beams having.

base flanges, and which shall be adapted to be used for supporting a trolley wire insulat-ed from the beams, or to supportand secure the bonding wire to afiord' reliable electric COIlIlQCtlOIlS, between two abutting rails orbeams. p

A further object is to provide an improved supporting hanger base which] shall be' adapted to be readily secured adj ustably and reniovably' to a beam having base flanges,"

and suitable for use for various purposes, more particularly in SUPPOI'lZlIlg electric circuit wires-in coal, mines or in other'mines, and which shall not be costlyto manufacture and shall be durable and economical in use. 'Wltll the above-mentioned and other ob ]ects-1n view; the invention consists in a jaw clainp of novel construction whereby to secure an electric circuit'wirein place,

being provided withineans whereby to se-' invention is to i provide hereto. 7 v 7 Referring to the drawings,'-Figurel is a fragmentary perspective view ot-roof further defined the claims appended jbeams arranged as in coal nii-nes land a trolley wire providedwith'the improved support connected to one of thelbeams, Fig; Qis a perspective View of the electriccircuit support base on an enlarged scale, in connection witha beanior rail showiif by broken lines; Fig. 3 is a .vertical'central section of the improved support attached to beam to whichrthe electric-circuit support is connected, the support being provided with a lateral'brace; and Fig.6 is afrag inentary 7 side view of? a railway track 'pro ing'a trolley wire; Fig. l is'a side View of 2111;

a'beain shown in cross-section and support- 7 vided with a bonding wire secured in place.

by meansof the improved support. q

Similar reference characters in the various figures of the drawings indicate corresponding elements or features of construe-a tlOI1 here n referredto in detail. I

Ininines especially in C02 "iminesfthc" roofs of rooms and galler es are supported Y by meansof metallic beams which'in some Another object is to provide an improved cases are of I-section shape, but in'i'nany cases Q wornout; or damaged railway r'ail's are eco-f nomically -used as root 'beains, each beam-Vin room and in niany' cases some' of the beams,

arev lower than the others railway tracks are laid longitudinally on the floor of the gel- 2 'lery or chamber, anda trolley wire is strung 7 "above the track and supported by'the-beains byinore 'orless crude devices, resulting in V r causingtrouble in operation of the'trolley' cars used for hauling coal. v

The improved straight rod 4; having screw threadsf5 ex- 6 is placed. The oppositeend'of'the'rod the'edge of one ofthe beairi'fianges the j aw extending from oneside of the rod and having a lip 8. thereon which-has" an inclined under face 9'adapted to engage thetop of the, flange for supportand clutching engageinent when the rodjis beneath the'flange. The opposite side of the'rod has a hanger support 1 comprises a tending from one end thereof on which a nut base jaw 7 fixedthereon adapted to engage stud 10 fixed thereon ofsiiitable length which has screw threads 11 thereon thestu'd be ing fixed also to the jaw, and the stud preterably has a hole12 therein toreceive a bonding wire when required. Thev rod 4 has an adjustable jaw 13 thereon opposite to the fixed aw 7 and it has a lip 14 provided with an inclinedunders faceilo adapted to engage the top of the opposite flange of the beam. The jaw 13 has a concave guide 16 adapted to engage theunder side ot' the rod 4, the guide ha ving sides 17 extending up to the bottom of the .flange so as to operate in 7 connection with the lip let to clutch tightly on the flange when, forced by the nut 6.

Various types of clamps aresecured to the trolley wire, and they may be adapted to be secured directly to the stud 10, with suitable insulating devices intervening; but

preferablyan insulator is used,which comprises a shell 18 havinga socket 19 1'0- vided with internal screw threads 2( the socket being directly connected to the stud 10,,and the shell .hasan electrical insulator 21 therein in which a stud 22 is secured that has screw threads 23. Preferablyan extension rod 24 is provided which has asocket 25 to receive the stud 22, the socket having internal, screw threads 26 toengage the screw threads 23, the rod having external screw threads 27 .sin1il ar to the screw threads 23. Thepextensionlrods' .maybe made in different lengths, so that thetrol- ,ley wire may be leveled when the. bottoms of the root beams are not all ,onone and the same level. The trolley wire clamp in the present case comprisesa head 281 having a socket 29 to receive the end portion of the rod 24 and being provided with internal screw threads 30 to engage the screw threads27. The head28 has. a jaw .31 fixed thereon and a companion jaw 32h inged to the head and provided with a clamp bolt.33, the trolley wire 34: being tightly secured between thejaws.

lVhen there are curvesor it is desired to laterally brace thev supports anangle brace 35 is provided which has aneye 86 onone end thatis connected to the, extension rod 24, another base clamp is securedto the beam, and I the brace is provided -with .an

eye 87 connected to the stud 10, the .eye be- I 1ng p, evided with a suitablelinsulator 38 suitablysecured in place.

I lb-vionsly the, extension rod 24f may be transposed. relatively to the insulator, the

socket25-being connected to thestud 10and the socket l9' of the insulator connected to .the end ofthe rod 2 1,.the socket 29 then be 1 mg connected to the stud22of theinsulator. .60.,1' guired, .the socket 29 .in such case's being n.some cases, the extension rod 24;. isnot re c, nnected directly to the studi22gand the soicket 19 to thejstud 10.

,In Fig. 5 portions of two contiguous track ire g s 5 fi 3 shown .Wll h ar 7 vided with splice bars 41 to constitute a rail joint, and a base clamp is. secured to each rail, a bonding wire 42 being inserted in the holes 12 of the studslO and secured in place by means of a nut 48 on each stud. lhus the bonding-wire is-firmly connected electrically with the two rails, the rails being so connected by means of splice bars, the bars however being loose in many cases and failing to insure a reliable electric circuit.

In practical use the trolley Wire is firmly supported by the devices described so as to be free from kinks or crooked vportions, being level, or parallelv to the. plane of the railwaytrack, so as toinsure smoothoperations of the trolley on the feed wire, the latter being laterally braced on curves when considerably below any beam. by which the wire is supported. In. case the traclris removed from any portion of a minethe trolley wire and its supports may alsobe readily removed and saved for use :elsewhere.

insulator on the oppositeside thereof, another ja w adjustable on the rodandprovided with means to force it towards the fixed aw, and. a hanger clamp connectedto 1 the insulator.. v

4. An electric-circuit .support nclud nga,

rod having a jaw and a hanger.stud fixed to opposite sides respectively of the ro d,, t he rod having also another-jaw adjustable thereon opposite to the fixed jaw, eachgjaw ,extending. towards theother'and having an under. side extending at an acutev angle; from the rod.

5 An electric-circuit.support including a rod having a aw and .a screw-threaded hanger stud. fixed toopposite sides respectively of the rod, the stud having atrans- .verse hole adjacent to the rod,anotherjaw adjustable on the rod ,and hav-ing ,a lip. on

one .side and f a guide on 7 the opposite side thereofi and a device to be screwed onto thestudto secure; a circuit wire thereto;

- 6. An electri circuitsupport includingla straight ro d having a jaw and a .serew threaded hanger stud fixed: to opposite sides respectively ofgthe -rod adjacent; to oneyend thereof, the ro d having screw.threads ex- .ttend l g-tmm h opposite en there f, 1: 11-

- 3. An electric-circuit.support including a rod having a aw fixedon one-side and/an vided with a transverse hole adjacent to the rod, a nut on the clamp rod engaging the screw threads thereon, a jaw adjustable on the clamp rod and having a lip on-one side and a guide on the opposite side thereof, and a device to be screwed onto said stud to connect a circuit wire to the stud and thereby to said fixed jaw.

8. An electric-circuit support comprising a clamp rod having screw threads extending from one end and a jaw having a lip ad jacent to the opposite end thereof fixed on one side of the rod, the opposite side of the rod having a screw-threaded stud thereon, a nut on the clamp rod engaging the screwthreads thereon, a jaw adjustable on the clamp rod between the fixed jaw ;and the nutand having a lip thereon, an insulator connected to said stud, an extension rod connected to the insulator, a'trolley wire clamp connected to 'the extension rod, a base clamp having jaws and also a stud having an insulator thereon, and an angle brace connected to the extension rod and also to the insulator on said stud.

9. In an electric-circuit support, a base clamp comprisin a rod having a jaw fixed on one side and a stud fixed on the opposite SlCiO thereof, the aw having a lip on one side thereof extending partially over the rod, the stud having screw threads thereon to support a circuit wire, a'jaw adjustable on the rod and having a lip on one side thereof extending partially over the rod, and

means co-operating with the rod'to force the adjustable jaw towards the fixed jaw.

10. In an electric-circuit support, the combination with a trolley wire clamp, and an insulator to support the clamp, of a clamp rod having a stud fixed on one side thereof to support the insulator, the rod having a jaw fixed on the opposite side thereof, the

jaw having a lip on one side thereof extend- 7 ing partially over the rod at a distance therefrom, a jaw adjustable on the clamp rod and having a lip'on one side and a guide on the opposite side thereof, the lip extending partially over the red at a distance therefrom and the guide having a concave face receiving a portion of the rod, and means 00- operating with the clamp rod to force the adjustable jaw towards the fixed jaw.

11. In an electric-circuit support, the coin-f bination of two clamp rods spaced apart in parallel arrangement, eachofsaid rods hav 111g two jaws thereon of which one is fixed and the other, adjustable on the rod and projecting from one side of the rod, one of the jaws having a screw-threaded hanger stud fixed thereto and extending from the opposite side of the clamp rod, an insulator and an extension rod rigidly connected together and to one of said studs and having a trolley wire clamp secured thereto, and an angle brace connected to'the remaining one.

of said studs and having operative connection with the extension rod. i

12. In an electric-circuit support, the combination withan electrical circuit wire, of a plurality of supports comprising each a clamp rod having two jaws thereon and.

projecting from one side of the rod to cooperate one with another, one of the jaws havinga screw-threaded hanger stud fixed thereto and projecting from the opposite side of the clamp rod, and a plurality of devices co-operating with the hanger studs of the supports respectively to support the circuit wire.

18. In an electric-circuit support, abase clamp comprising a clamp rod having two jaws thereon to cooperate one with another on one side of the rod, one of the jaws having a screw-threaded hanger stud fixed thereto andprojecting beyond the opposite a side of the clamp rod, and a screw-threaded i device to be screwed onto the hanger stud to connect a circuit wire substantially to the i stud and thereby to the base clamp.

In testimony whereof, we aflixjour signatures on the 12th day of January, 1923.

EARL R. BIGGS, CARL R. BIGGS. 

